It is convenient for x - ray tube excited source to detect multi - component on site due to the advantages of high excitation flux , easy protection , and characteristic x - ray and continuous bremsstrahlung spectrum included in its exciting spectra X光管激发源具有活性强、易于防护等优点，产生的激发谱包括特征x射线和连续的轫致射线谱，方便现场测定多元素。
A point in the cast piece and a point in the cast modl are chosen as referencial points , the results of the two points ' temperature distrbute by computing and testing are compared : causes for the clearance are analysed 为了验证计算结果的准确性，在铸件及铸模上各选一个参考点，对参考点温度值随时间的变化，进行了现场测定，并将计算结果与实测值做了对比，最后分析了误差产生的原因。
Working conditions and productive capacities of both drill carrier and carry - scraper used during mechanical cut and fill stopping activities in xinqiao mining cooperation ltd . are evaluated by field testing and theoretical analysis in this paper 摘要以新桥矿业有限责任公司大型机械化上向水平分层充填采矿法中使用的凿岩台车和铲运机为研究对象，通过现场测定和理论分析相结合，评价了无轨设备的应用状况和生产能力。
